1720697 has 8 divisors (see below), whose sum is σ = 1976160. Its totient is φ = 1481760.

The previous prime is 1720679. The next prime is 1720703. The reversal of 1720697 is 7960271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1720697 - 2⁶ = 1720633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3908 + ... + 4325.

It is an arithmetic number, because the mean of its divisors is an integer number (247020).

2^1720697 is an apocalyptic number.

It is an amenable number.

1720697 is a deficient number, since it is larger than the sum of its proper divisors (255463).

1720697 is a wasteful number, since it uses less digits than its factorization.

1720697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8263.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 1720697 is about 1311.7534067042. The cubic root of 1720697 is about 119.8307103615.

The spelling of 1720697 in words is "one million, seven hundred twenty thousand, six hundred ninety-seven".